Inline Water Filter 4378411RB

Brand: Whirlpool · Appliance: Refrigerator · Fits: 4 models · Reference price: $30.53

4378411RB is a Whirlpool replacement part (inline water filter) for refrigerators. Our fitment data lists 4 models that use it.

When to replace this part

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Models that use this part

Other parts for model RT21LMXKQ00

If you are repairing that appliance, these are the most model-specific parts on file for the same model.

• Door Handle - White WP2202807W
• Freezer Door Handle - White WP2202806W
• DOR-FIP W11023679
• TRIM-SHELF WP2188689
• Refrigerator Compartment Door WP2218118
• Refrigerator Top Door Hinge WP2189412
• TUBE 2154109
• Refrigerator Shim Hinge Center WP2183854

Reference price and where to compare

The reference price on file for this part is $30.53. It is informational only, not an offer or an Amazon price — RepairKitHub does not sell parts directly.

Compare 4378411RB listings on Amazon

Before you order

• Match the part number character for character, including dashes and trailing letters; a single different character is usually a different part.
• Confirm your appliance's model number on its data plate and check that it appears in the list above (or use the model lookup tool).
• If a seller offers a substitute number, check that it appears in this page's replacement list or in the manufacturer's documentation.

Model lookup tool